The creation of a new kind of citizen in the 14th Amendment put the Federal government in our lives forever, but not necessarily for better. "Citizens of the United States" did not exist before that amendment. It protected blacks, which it was intended to do, by giving the Fed govt the power to protect them.
But it gave the Fed govt the power to do such things as to "enter our bedrooms," to create a Fed. income tax, and to generally be "Big Brother."
It was the beginning of the end of "state's rights."